HSG80 ACS Solution Software V8.6 for IBM AIM Installation and Configuration Guide

Planning Storage 2–29
■ SECTORS_PER_TRACK—the number of sectors per track used. The range is from 1
to 255.
Unit Switches
Several switches control the characteristics of units. The unit switches are described under
the
SET unit-number command in the Compaq StorageWorks HSG80 Array Controller ACS
Version 8.6 CLI Reference Guide.
One unit switch, ENABLE/DISABLE_ACCESS_PATH, determines which host connections
can access the unit, and is part of the larger topic of matching units to specific hosts. This
complex topic is covered in Chapter 1 under the following headings:
■ “Assigning Unit Numbers,” page 1–14
■ “Selective Storage Presentation,” page 1–17
Storage Maps
Configuring a subsystem will be easier if you know how the storagesets, partitions, and
JBODs correspond to the disk drives in your subsystem. You can more easily see this
relationship by creating a hardcopy representation (a storage map).
Creating a Storage Map
To make a storage map, fill out the templates provided in Appendix A as you add
storagesets, partitions, and JBOD disks to the configuration and assign them unit numbers.
Label each disk drive in the map with the higher levels it is associated with, up to the unit
level.